The IBiz E-Payment Integrator provides a way to add secure and reliable Internet payment processing to your applications. The product contains libraries and PHP extensions for credit card and electronic check (ACH) processing via major Internet payment gateways (more than 50 gateways supported including Authorize.net, IBill, LinkPoint, etc.). It includes source code for compilation on various Unix platforms, a framework for Objective-C (Cocoa) Mac OS X development, native PHP extensions, and more.
SiteManager is an Open Source Web Application Toolkit for PHP Developers that includes a framework for code modules and layout templates, database connectivity, SmartForms, sessions, and some other tools. All parts of the system are integrated through object-oriented libraries which allow for easy expandability and maintenance.